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- Johansson, Carin, et al.
(författare)
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Development of a light-weight wood-joist floor with high impact sound insulation
- 1989
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Ingår i: Engineering for environmental noise control. - Poughkeepsie, N.Y : Noise control foundation. - 0931784204 ; , s. 621-624
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Konferensbidrag (refereegranskat)abstract
- When building small and medium size houses for more than one tennant the demands for good sound insulation are high. In Sweden it has become more and more popular to build these kind of houses in lightweight timber constructions. A disadvantage then is that problems with bad sound insulation increases. For a building enterprise that build prefabricated wooden houses there is normally no problem in designing partitioning walls to fulfill these demands
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- Ågren, Anders
(författare)
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Shield with cooling media for gas cutting flame
- 1986
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Ingår i: Progress in noise control. - Poughkeepsie, N. : Noise control foundation. - 0931784158 ; , s. 1433-1438
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Konferensbidrag (refereegranskat)abstract
- In continuous casting of steel, an endless slab is produced. The slabs which can be both wide and thick are beeing cut to proper lengths by high performance gas cutting burners. The burners operate at high oxygen pressure so that the cutting flame is launged at speed up to 1.4 Mach. By optimizing the construction of the cutting nozzles and the oxygen pressure the noise levels can be reduced by about 10 dB(A). If doing so the noise problems still exist as the levels will remain at 90-100 dB(A). In this paper the authors persent a method of enclosing the burner with a shield that is supplied with cooling water, where the water acts both as a cooling media and a noise barrier.
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